Table 2.
Effect of perch type and height on perching attempts recorded in the daytime at 1, 3, 5 weeks of ages (No. perching attempts/ hour^*)

		Weeks
		1	3	5
Perch type
Wood		26.17^a	45.42^a	55.36^a
Steel		5.11^b	26.58^b	29.89^b
Plastic		0.47^c	15.61^c	21.92^c
SEM		0.77	0.89	1.97
Perch height
10 cm		10.20	45.69^a	48.74^a
30 cm		10.96	12.72^b	22.70^b
SEM		0.62	2.36	1.60
Perch type^*Height
Wood	10 cm	25.78	62.83	58.39^a
Wood	30 cm	26.56	28.00	52.33^ab
Steel	10 cm	4.50	44.50	47.00^bc
Steel	30 cm	5.72	8.67	12.78^d
Plastic	10 cm	0.33	29.72	40.83^c
Plastic	30 cm	0.61	1.50	3.00^e
SEM		1.08	4.09	2.78
P-values
Perch type		<.0001	<.0001	<.0001
Perch height		0.393	<.0001	<.0001
Interaction		0.909	0.602	<.0001

Means in same rows with different superscripts are significantly different (P<0.05).
Means are average of the number of successful attempts at perching as sitting, standing, walking, preening for period of < 2 secs per each 1 hour at 05:00~06:00, 12:00∼13:00, 18:00∼19:00 for 3 days in daytime (n=9).